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56 problems total

Array (174)Sorting (45)Depth First Search (44)Tree (41)Breadth First Search (35)Linked List (28)Stack (27)Recursion (18)Graph Theory (12)Monotonic Stack (8)Queue (6)Shortest Path (2)

All Topics(4301)Bash(0)Database(0)Java(0)Javascript(0)Networking(0)Object Oriented Design(1)Programming Languages(0)SQL(0)System Design(0)Algorithms(522)

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Title	Difficulty	Videos	Companies
Reverse Integer	medium	-	adobe amazon apple
Find the Index of the First Occurrence in a String	easy	-	adobe amazon apple
Next Permutation	medium	-	adobe amazon apple
Longest Valid Parentheses	hard	-	adobe amazon apple
Valid Sudoku	medium		adobe amazon apple
Sudoku Solver	hard	-	adobe amazon apple
Combination Sum 1	medium		airbnb akuna-capital amazon
Jump Game 2 - Get min jumps	medium	-	adobe amazon apple
Permutations of Array 1	medium	-	adobe amazon apple
Permutations of Array 2 - Array has duplicates	medium	-	adobe amazon apple
Spiral Matrix 1 - Return	medium		adobe amazon apple
Kth Permutation Sequence of Numbers 1 to N	hard	-	amazon apple facebook
Valid Number	hard	-	adobe amazon apple
Search a 2D Matrix 1 - Elements sorted row-wise and first integer of each row is greater than last element of previous row is greater than last element of previous row	medium	-	adobe amazon apple
Partition List	medium	-	amazon apple linkedin
Scramble String	hard	-	apple google
Unique BSTs 2 - Generate	medium	-	adobe amazon apple
Minimum Depth of Binary Tree	easy	-	amazon apple facebook
Best Time To Buy And Sell Stock 1 - only one transaction	easy		adobe akuna-capital alibaba
Binary Tree Path Sum - Maximum between any two nodes	hard		adobe amazon appdynamics
Fraction to Recurring Decimal	medium	-	airbnb amazon apple
Excel Sheet Column Title	easy	-	adobe apple facebook
Excel Sheet Column Number	easy	-	amazon apple bloomberg
Number of 1 Bits	easy		adobe amazon apple
Count Primes	medium	-	adobe amazon apple
Contains Duplicate 2 - within k distance	easy	-	adobe airbnb amazon
Contains Duplicate 3 - within k distance and t difference	hard	-	adobe airbnb apple
Rectangle Area - Total area of two rectangles	medium	-	apple facebook microsoft
Number of Digit One	hard	-	amazon apple
Flatten 2D Vector	medium	-	airbnb apple facebook
Binary Tree Path - All root to leaf paths	easy	-	adobe amazon apple
Single Number 3 - All elements except two occur twice	medium	-	amazon apple facebook
Zigzag Iterator	medium	-	amazon apple cruise-automation
Peeking Iterator	medium	-	amazon apple atlassian
Find Duplicate Number in array containing n+1 numbers between 1 and n	medium	-	adobe amazon apple
Find Median from Data Stream	hard		adobe amazon apple
Serialize and Deserialize Binary Tree	hard		amazon apple bloomberg
Remove Invalid Parentheses Problem	hard	-	amazon apple bloomberg
Range Sum Query 2D - Immutable	medium	-	amazon apple cruise-automation
Integer Break	medium	-	adobe apple google
Top K Frequent Elements	medium		amazon apple bloomberg
Design Snake Game	medium	-	amazon apple bloomberg
Design Hit Counter	medium	-	affirm amazon apple
Frog Jump	hard	-	amazon apple bytedance
Concatenated Words	hard	-	amazon apple audible
Generate Nth Fibonacci Number	easy		amazon apple barclays
Single Element in a Sorted Array	medium	-	amazon apple atlassian
Accounts Merge	medium	-	amazon apple bloomberg
Cherry Pickup	hard	-	adobe akuna-capital amazon
Toeplitz Matrix	easy	-	apple facebook google

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